要从整数列表中打印重复项,请使用ContainsKey。
下面,我们首先设置整数。
int[] arr = { 3, 6, 3, 8, 9, 2, 2 };
然后使用Dictionary集合获取重复整数的计数。
让我们看一下获取重复整数的代码。
using System; using System.Collections.Generic; namespace Demo { public class Program { public static void Main(string[] args) { int[] arr = { 3, 6, 3, 8, 9, 2, 2 }; var d = new Dictionary < int,int > (); foreach(var res in arr) { if (d.ContainsKey(res)) d[res]++; else d[res] = 1; } foreach(var val in d) Console.WriteLine("{0} occurred {1} times", val.Key, val.Value); } } }
输出结果
3 occurred 2 times 6 occurred 1 times 8 occurred 1 times 9 occurred 1 times 2 occurred 2 times